Par is All relative . He is a good enough grower to SEE when his plants are happy . He then just notes the par level for future reference . With my first one I had it down pat by time they went into flower . During veg of 3 weeks I figured the light and par out .
He will too. Doesn’t matter what the number is
850 or 1075 , happy plants are happy plants .
If his big time pray is at 900 par on HIS METER OR PHONE , and 800 produces happy horizontal leafs , then he knows at 800 on HIS METER , his plants are using the optimal amount of light .
Don’t be caught up in the number , means nothing , but it will be close to published standards . Just find what the plants like and use that as YOUR NUMBER .
Read all your posts , your bright as Hell , you understand what I’m saying . Use it as a tool , of relativity , that’s its use . Even the par best you can across canopy , maintain it steady , the meter will allow you to do just that . Forget about calibrating it or how it compares to an apogee , means jack . Watch your plants , note note par , play with it while in veg to see what they can handle .
Glad to see light is down and power lower .